# Question

The FL Crime data file on the text CD contains data for all counties in Florida on y = median annual income (thousands of dollars) for residents of the county and x = percent of residents with at least a high school education. The table shows some summary statistics and results of a regression analysis.

a. Find the correlation r. Interpret

(i) The sign and

(ii) The magnitude.

b. Find the predicted median income for a county that is 1 standard deviation above the mean on x , and use it to explain the concept of regression toward the mean.

a. Find the correlation r. Interpret

(i) The sign and

(ii) The magnitude.

b. Find the predicted median income for a county that is 1 standard deviation above the mean on x , and use it to explain the concept of regression toward the mean.

## Answer to relevant Questions

For the House Selling Prices FL data set on the text CD, when we regress y = selling price (in dollars) on x = number of bedrooms, we get the results shown in the printout. a. One home with three bedrooms sold for $338,000. ...For the study of high school female athletes, when we use x = maximum bench press (BP) to predict y = maximum leg press (LP), we get the results that follow. The sample mean of BP was 80. a. Interpret the confidence interval ...Refer to the previous exercise. Conduct a regression analysis of y = RUNS and x = HIT. Does a straight-line regression model seem appropriate? Prepare a report a. Using graphical ways of portraying the individual variables ...Suppose the correlation between height and weight is 0.50 for a sample of males in elementary school, and also 0.50 for a sample of males in middle school. If we combine the samples, explain why the correlation will probably ...Exercise 12.58 about U.S. population growth showed a predicted growth rate of 13% per decade. a. Show that this is equivalent to a 1.26% predicted growth per year. b. Explain why the predicted U.S. population size (in ...Post your question

0